Results 81 to 90 of about 17,525 (137)
Study of Double-mode RR Lyrae Stars in the Stripe 82 Region Using SDSS and ZTF
The Astronomical JournalRRd stars are a subclass of RR Lyrae stars that pulsate simultaneously in the fundamental and the first-overtone radial modes. We report the analysis of 10 RRd stars discovered in the Sloan Digital Sky Survey (SDSS) Stripe 82 region of the Galactic halo ...
Vaidehi Varma, Chow-Choong Ngeow
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The Galactic Bulge Exploration. III. Calcium Triplet Metallicities for RR Lyrae Stars
The Astronomical JournalRR Lyrae stars (RRLs) are excellent tracers of stellar populations for old, metal-poor components in the the Milky Way and the Local Group. Their luminosities have a metallicity dependence, but determining spectroscopic [Fe/H] metallicities for RRLs ...
Andrea Kunder +7 more
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Globular clusters, Hipparcos, and the age of the galaxy. [PDF]
Proc Natl Acad Sci U S A, 1998 Reid N.
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First Detection of Shock Waves in RRc Stars
The Astrophysical JournalAlthough shock waves have been well documented in fundamental-mode RRab stars, their existence in first-overtone pulsator stars, RRc stars, has remained uncertain. Building upon the spectroscopic frameworks established by M. Chadid et al., we present the
Junzhang Li, Merieme Chadid
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Measuring cosmological parameters. [PDF]
Proc Natl Acad Sci U S A, 1998 Freedman WL.
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MAGELLANIC CLOUDS, X. AN EVALUATION OF THE ZERO POINT CORRECTION. [PDF]
Proc Natl Acad Sci U S A, 1954 Shapley H, Nail VM.
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THE MAGELLANIC CLOUDS. XIV. THE BAR OF THE LARGE CLOUD. [PDF]
Proc Natl Acad Sci U S A, 1955 Shapley H, Nail VM.
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Magellanic Clouds: VI. Revised Distances and Luminosities. [PDF]
Proc Natl Acad Sci U S A, 1953 Shapley H.
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